Grinding-mill.



No. 643,4!2'. Patented-fab. is, I900. .J. A. KELLEY & s. w. HOUSE.

GRINDING MILL.

(Application filed June 28, 1899.

(No Model.)

INVENTORS (Jo 7'24, e2. e/ZZe aqgZk zeyz, 5302239, %4/9 I WITNESSESUNITED STATES PATENT @FFIoFE.

jOIIN A. KELLEY AND STEPHEN IV. ROUSE, OF FREMONT, MINNESOTA;

GRINDING-MILL.

SPECIFICATION forming are of Letters Patent No. 643,412, dated February13,1966;

Application filed June 28, 1899 Serial No. 722,167. (No model.)

To all whom it may concern.-

Be it known that we, JOHN A. KELLEY and STEPHEN W. RoUsE, citizens ofthe Unite'd States, residing at Fremont, in the county of Winona andState of Minnesota, haveinvented certain new and useful Improvements inGrinding-Mills, and we do hereby declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled inthe art to which it appertains to make and use thesame.

This invention relates to improvements in grinding-mills, and moreparticularly in the means employed to maintain the millstones in properrelative grinding relation to each other.

The objects of the invention are to provide a simple and durable endthrust-bearing for the shaft of the adjustable millstone capable ofexerting the necessary pressure on the shaft without unnecessarilyincreasing the friction and wear on the shaft or the bearing, to providelarge antifrictional surfaces for said thrust-bearing, and to generallyimprove the construction of the end thrust-bearing for themillstone-shaft.

With such objects in view the invention is embodied in the parts,combinations, and arran gements of parts, as hereinafter described, andmore particularly set forth in the claims.

In the accompanying drawings we have shown a practical embodiment of theinvention; but we desire it understood that we do not limit theimprovements in their useful applications to the particular constructiontherein illustrated.

In said drawings, Figure 1 is an elevational view illustrating ourinvention; and Fig. 2 is a sectional view on the line 2 2-, Fig. 1.

Referring to the accompanying drawings, wherein like referencecharacters refer to similar parts throughout both views, A indicates apart of the framework of a grindingmill and which supports the severalpart-s of our improvements. Slidably and rotatably mounted in bearings bb in bars B B of this frame is the shaft 0, which carries the adjustablemillstone. (Not shown.) This shaft 0 is provided with a suitabledrivingpulley.(indicated at D) and has at its end a disk or head E,provided with a beveled or inclined bearing-surface e.

Mounted to slide in bearings f, supported is secured a spring J, actingto hold the slid ing frame I up or away from the end of the millstoneshaft G; Fulcrumed on a pin it on the supporting-frame is a lever K,having a bearing slot or hole It, in which bears a stud or pin on thesliding frame I. Surrounding the stud or pin 70" to receive the thrustof the lever is a yielding cushion or spring L. Any suitable means,suchas a weight or screw, (not shown,) may be provided for exerting thenecessary pressure on the lever K, and through it on the sliding frame Iand millstone-shaft C. I

M M indicate large circular disks or wheels carried by axles .m m androtatably mounted in bearings N N on the sliding frame I. axles m m arearranged at an angle relative to each other, and consequently the largedisks M M are arranged angularly relative to each other, the relationbeing such as to cause the peripheries of the disks M M to bear fiatagainst the inclined or beveled bearing-surface e on the head E on themillstoneshaft 0, thus forming an extended movable antifrictionalthrust-bearing for the head E.

The

In the drawings the sliding frame and the bearing-disks are shown asbeing above and bearing down on the shaft; butit is evident that withonly obvious changes in the weight or moving means for the lever K theimprovements are equally adapted for use on the lower end of a shaft forexerting upward pressure, and the improvements are also applicable tohorizontal shafts.

Having thus described our invention, what we claim is- 1. Thecombination with a supportingframe, and a slidable millstone-shaftjournaled in bearings on the same, of a sliding frame, a spring actingto move said sliding frame in one direction, a lever fulcrumed to saidsupporting-frame and having a cushioned engagementwith said slidingframe, means for moving said lever to move said sliding frame againstthe tension of said spring, and rotatable disks j ournaled on saidsliding frame at an incline to each other and ICO spring, and rotatabledisks journaled on said sliding frame and bearing against a part carriedby said millstone-shaft, substantially as described.

In testimony whereof we affix our signatures in presence of twowitnesses.

JOHN A. KELLEY. STEPHEN W. HOUSE.

Witnesses:

O. A. CAMERON, S. A. RAYMOND, Jr.

